Sonic Racing DS models with bones

[Bennyp21]

I'm trying to mod Sonic & Sega All Stars Racing on the DS for the fun of it, but I don't how to covert models so I can add custom characters.

The files I'm trying to covert (with bones ofcourse)

• stdl
  
• stmap
  
• sttex
  

So can you guys help me or tell me if it's possible or not.